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How Does a Concrete Pump Work?

Oct. 09, 2021
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Concrete Pump


The concrete pump has high productivity and can complete the horizontal and vertical transportation of concrete at one time. However, there are certain requirements for the concrete mix ratio, coarse and fine aggregate particle size and gradation, cement dosage, and concrete slump to ensure good pumping efficiency. So what is the working principle of the concrete pump? Read on for more information.

 

Piston Concrete Pumps

There are hydraulic drive types and mechanical drive types. The hydraulic-driven concrete pump consists of a hopper, hydraulic cylinder and piston, concrete cylinder, distribution valve, y-shaped pipe, flushing equipment, hydraulic system, and power system. The hydraulic system pushes the piston reciprocating movement by pressure. The piston absorbs material when moving backward and presses the concrete in the concrete cylinder into the delivery pipe through a y-shaped pipe when pushing forward. After pumping concrete, the pump body and delivery pipe are cleaned with high-pressure water or compressed air. The displacement of piston concrete pumps depends on the number and diameter of concrete cylinders, the speed of piston reciprocating movement and the volumetric efficiency of concrete cylinder suction, etc.

 

Squeeze type concrete pump

There are three types: rotor type double roller type, straight pipe type three roller type, and belt type double groove type. The rotor-type double roller concrete pump consists of a hopper, pump body, extrusion hose, vacuum system, and power system. The pump body is sealed, the rotor frame inside the pump body is equipped with two planetary rollers, the inner wall of the pump body is lined with a rubber gasket, and the inner circumference of the gasket is equipped with an extrusion hose. The power device drives the planetary roller to rotate and crush the extruded rubber tube, which will squeeze the concrete inside the tube into the delivery pipe and discharge. The vacuum system keeps a certain degree of vacuum in the pump body, which makes the squeeze hose recover immediately after crushing and makes the concrete in the hopper speed up to be sucked into the squeeze hose. The displacement of the extruded concrete pump depends on the rotor's turning radius and turning speed, the diameter of the extruded hose, and the volumetric efficiency of the concrete intake.

 

Hydraulic diaphragm type concrete pump

It consists of a hopper, pump body, diaphragm, control valve, water pump, and water tank. The diaphragm in the pump body, when the pump will pump the water below the diaphragm back to the tank through the control valve, the diaphragm sink, the concrete in the hopper press open one-way valve into the pump body; when the pump will pump the water in the tank back to the pump body through the control valve, the pressure water makes the diaphragm rise up, close the one-way valve, the concrete will be pressed into the delivery pipe discharge.

 

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